How and why the wine can go bad?

Wine can go bad due to various reasons such as exposure to air, improper storage, and contamination with bacteria or other substances.

Some tips how to identify spoiled wine:

Smell: one of the most reliable indicators of spoiled wine is a sour or vinegar-like smell. If the wine smells musty, like wet cardboard, or has a smell that is different from what is expected for that type of wine, it may have gone bad.

Appearance: In some cases, wine that has gone bad may have a cloudy or hazy appearance. This can be due to the presence of sediment, which is a sign that the wine has not been properly stored.

Taste: Wine that has gone bad will often taste harsh, flat, or have an unpleasant aftertaste. If the wine tastes off or has lost its flavor, it is likely spoiled.

Cork: Check the cork for any signs of leakage or mold. If the cork is pushed out of the bottle or has visible mold growth, it is likely that the wine has been exposed to air and may have gone bad.

Bubbles: While sparkling wine should have bubbles, if you notice an excessive amount of bubbles, it may be a sign that the wine has started to ferment again in the bottle and has gone bad.

It’s important to note that not all bad wine is harmful to drink, but it will not taste good and may cause discomfort or illness. If you are unsure whether a wine has gone bad, it’s better to be safe and just not drink it.